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Tag Archives: International Bureau of Weights and Measures

This replica of a kilogram is on display at the National Institute of Standards and Technology, which is part of Department of Commerce. The domes are to protect it from environments that might alter it.

The metric system (or SI as it is known around the world) was first implemented in France back in 1795. Since then, almost every country in the world has adopted this set of measures with the United States being one of the few holdouts from full adoption. (The others are Liberia and Burma/Myanmar.)

Back In 1799 the meter was defined by a prototype meter bar. Later, a scientific standard for the meter was defined in 1960, and was redefined in 1983. It is currently the length of the path that light travels in a vacuum in 1/299,792,458 of a second.

If you have the precision equipment to make that measurement, all those “meters” around the world are exactly the same.

Having a physical standard/prototype has inherent problems. There are additional physical standards or “artifacts” that are stored around the world which are periodically compared to the one in France to make sure they all have the same mass. However, over time, the duplicate kilograms have “drifted” away from that the one in France. (Several of these prototypes are held by our own National Institute of Standards and Technology in Maryland.) That’s a problem when things like oils from people’s skin or even dust could impact its mass if it is not perfectly protected. And perfect, in this sense, is impossible.

Crease relates that two different technologies were being applied to solve the problem of creating the kilogram in the laboratory. One was the “Avogadro method” that “…realizes the mass unit using a certain number of atoms…”

(I’m not going to go into a lot of detail here because I’ve yet to understand it myself.)

Crease also relates…

The “watt balance” approach, on the other hand, ties the mass unit to the Planck constant, via a special device that exploits the equality of SI units of mechanical and electrical power. p. 255

May 20 will be the 139th anniversary of the United States as one of the original signatory nations of the Convention of the Meter also known as the Treaty of the Meter. On that day the world took a leap forward and officially recognized the need to protect and improve the metric system (or SI as it is known on the rest of the planet), through the creation of the International Bureau of Weights and Measures (BIPM). It is an intergovernmental organization that comes under the authority of the General Conference on Weights and Measures (CGPM) and the supervision of the International Committee for Weights and Measures (CIPM). On that day in Paris there was agreement on how the organization would be financed and managed, with member governments acting in common accord on all matters.

Ahem, then there’s the United States saying one thing and doing another

Despite:

Our first president’s (Washington…) speech about the need for uniformity of “currency, weights and measures” in the country during his first address in 1790;

yet, I’m still buying my hamburger by the pound, gasoline by the gallon and fabric by the yard. What’s wrong with this picture?

Plenty and that’s why I’ve been researching his topic for almost two years. I trust the documentary I plan to make will raise awareness of how far behind the rest of the world we’ve gotten and we’ll want to do something about it.

To commemorate this 139th anniversary, also known as World Metrology Day, I’ll give a talk at Mesa Public Library in Los Alamos, New Mexico on May 21 (Wednesday) at 6 p.m. The talk is free and open to the public. If you’re in the neighborhood, I hope you’ll drop by. I’ll try to be both informative and entertaining.

Feel free to join in to spread the word about all the advantages the metric system has versus our cumbersome U.S. customary units.

While not new, I found an interview where Rachel Maddow celebrated World Metrology Day back in 2010. You can view the seven minute clip here.

I hadn’t come across this before and was surprised to learn that several scientists with the National Institute of Standards were awarded Nobel Prizes for their work with time and temperatures during the past few years including: David J. Wineland (2012), John (Jan) L. Hall (2005) and William D. Phillips (1997) (More on them here.)

It’s not too early to start planning for next year

I don’t know that we’ll be in a better position to participate in World Metrology Day by the 140th anniversary (2015) but hopefully we will by the 150th anniversary, or sooner, if enough people in this country decide to do something about it.

It came to my attention recently that of the three countries in the world that don’t currently use the metric system on a routine basis: the United States, Burma and Liberia, it appears Burma has now announced its intention to switch over.

(Don’t let the Myanmar reference throw you, I’ve been using “Burma” in my writing and discussion because our government via the CIA Factbook classifies it as Burma.)

From the CIA Factbook

Anyway, this was sent out as a news story, ironically during our county’s National Metric Week and dated 10/10 no less:

Interestingly, I tried to confirm this from another news source but was unable to do so. I was only able to find the exact same story posted on a couple of other sites. Granted, one of them was on page 90 of a pdf titled: Myanmar Investment & Industry Information for Oct-5-11, 2013 and that cited Myanmar Time[s], October 6, 2013. Couldn’t locate the original story even after I switched to the English version of the Times. I also tried to confirm the information on the Myanmar government’s site, and while there I did discover it had a trade conference that week (which would make sense in terms of timing) but only the headlines were viewable in English so I couldn’t find anything more official.

Additional research led me to the following story from last year (July 26, 2012) that cited something from previous year that with the headline and subhead:

So, will Myanmar leave us in the dust regarding metric system adoption? It remains to be seen since I haven’t been able to locate information outside of what’s cited above (such as a proposed adoption date) so I’m willing to sit back for a while and see what else transpires on this front.

Still, if it does comes to pass, it will be the latest country the U.S. Metric Association will recognize as moving toward metric adoption since Jamaica in 1998. That’s not a typo, the fourth to the last country to switch to the metric system did so during the LAST century in 1998.

We are a member in the international organization that supports metric system measures around the globe

And just to be clear, every country in the world has “officially” adopted the metric system, including the United States. In fact, the United States signed the Convention of the Meter in Paris back in May 1875 and to this day is a member of the International Bureau of Weights and Measures. (World Metrology Day is on May 20 each year to commemorate the signing.)

Do we really want to come in second to last in this important race? Or even last, as is looking more likely?

It’s time to gain some momentum on this front and I plan to write about that more next weekend, stay tuned.